ASP.NET CookieµÄʹÓûã×Ü

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protected void btnSearch_Click(object sender, EventArgs e)
{
//Éú³ÉÌõ¼þ±í´ïʽ
string where = bll.GetWhereSql(Int32.Parse(ddlCate.SelectedValue),
Int32.Parse(ddlHarbor.SelectedValue), 0, 0, ddlState.SelectedValue, tbKeyword.Text.Trim());
//ÅжÏÌõ¼þCookieÊÇ·ñΪ¿Õ£¬È粻Ϊ¿Õ£¬ÔòÒƳýÏÖÓÐÌõ¼þCookie
if (Request.Cookies["Admin_HarborSpot_Where"] != null)
{
RemoveWhereCookie(where);//ÒƳýÏÖÓÐÌõ¼þCookie
}
//ÉèÖÃÒ»¸öеÄÌõ¼þCookie
SetWhereCookie(where);

BindData(true);
}
//ÉèÖÃÌõ¼þCookie
private void SetWhereCookie(string where)
{
HttpCookie cookie = new HttpCookie("Admin_HarborSpot_Where");
cookie.Value = where;
cookie.Expires = DateTime.Now.AddDays(1d);
Response.Cookies.Add(cookie);
}
//ÒƳýÏÖ´æµÄÌõ¼þCookie
private void RemoveWhereCookie(string where)
{
HttpCookie cookie = Request.Cookies["Admin_HarborSpot_Where"];
cookie.Value = where;
cookie.Expires = DateTime.Now.AddDays(-3d);
Response.Cookies.Add(cookie);
}